After experiencing intermittent performance issue (ping loss, total disconnect) with our P300-P300 bridge setup we looked into logs and found following happening in regular interval. The APs are 1.6KM apart and no aparent LoS issue.

Thanks for the confirmation. Can you please explain the significance of the of the daemon.err message? I am attaching a screenshot for wireless status page. Signal strength frequently dips to 1-bar (rssi below 10). Should I try changing the channel width to 20?